CN104412685A

CN104412685A - Interference mitigation in asymmetric LTE deployment

Info

Publication number: CN104412685A
Application number: CN201380036044.3A
Authority: CN
Inventors: N·王; J·侯; J·郭; M·冯
Original assignee: Qualcomm Inc
Current assignee: Qualcomm Inc
Priority date: 2012-05-31
Filing date: 2013-05-24
Publication date: 2015-03-11
Anticipated expiration: 2033-05-24
Also published as: CN104412685B

Abstract

Interference mitigation solutions are disclosed for interference experienced based on asymmetric uplink (UL)/downlink (DL) slot configuration. The aggressor/victim network entities are identified using either measurement or static/semi-static means, such that the victim network entities that may be impacted by interference from aggressor network entity transmissions are identified. Inter Cell Interference Coordination (ICIC) mechanisms are extended to negotiate and address scheduling that intelligently mitigates interference that occurs in the colliding slots.

Description

Interference mitigation during asymmetric LTE disposes

Technical field

Put it briefly, the aspect of present disclosure relates to wireless communication system, and specifically, the aspect of present disclosure relates to the interference mitigation in asymmetric Long Term Evolution (LTE) deployment.

Background technology

Wireless communication system is widely deployed to provide various communication service, such as voice, video, grouped data, message transmission, broadcast etc.These wireless systems can be can by share can Internet resources support the multi-access network of multiple user.Such network normally multi-access network, by share can Internet resources support for multiple user communication.An example of such network is universal land radio access web (UTRAN).UTRAN is the wireless access network (RAN) of the part being defined as Universal Mobile Telecommunications System (UMTS), is the third generation (3G) mobile phone telephony supported by third generation partner program (3GPP).The example of multi-access network form comprises code division multiple access (CDMA) network, time division multiple access (TDMA) network, frequency division multiple access (FDMA) network, orthogonal FDMA (OFDMA) network and Single Carrier Frequency Division Multiple Access (SC-FDMA) network.

Cordless communication network can comprise the multiple base station or Node B that can support for the communication of multiple subscriber equipment (UE).UE can communicate with base station with up link via down link.Down link (or forward link) refers to the communication link from base station to UE, and up link (or reverse link) refers to the communication link from UE to base station.

Base station can send data and control information to UE on the uplink, and/or can receive data and control information from UE on uplink.On the uplink, may meet with due to from adjacent base station or the interference that causes from the transmission of other less radio-frequency (RF) transmitter from the transmission of base station.On uplink, may meet with from the transmission of UE and carry out the interference of the ul transmissions of other UE communicated or the interference from other wireless RF transmitter from adjacent base station.Described interference may make the performance degradation in down link and up link.

Due to the sustainable growth to mobile broadband access demand, the possibility of interference and congested network increases along with more UE access long-range wireless communication network and more short-range wireless systems are deployed in community.Research and development Continual Improvement UMTS technology, not only to meet the growing demand to mobile broadband access, also will improve and strengthen the Consumer's Experience of mobile communication.

Summary of the invention

The representative aspect of present disclosure is for the interference mitigation solution for the interference based on asymmetric UL/DL time slot configuration.When meeting with such interference, infringing party/aggrieved party's network entity uses to measure or static state/semi-static method identification, thus identify may by the aggrieved party's network entity of interference effect transmitted from infringing party network entity.Then between Extended Cell, interference coordination (ICIC) mechanism is with settlement by agreement certainly scheduling, and the interference occurred in conflict time slot is alleviated in described scheduling intelligently.

In of present disclosure, the method of radio communication comprises and obtains state quality by the infringing party evolved node B (eNB) be associated with one or more network entity and measure, measured based on described state quality by eNB, identify one or more aggrieved party's network entities of the interference be subject to from asymmetric up link (UL)/down link (DL) time slot, and transmit control signal to one or more network entity, wherein, described control signal is relevant with the alleviation of interference.

In the additional aspect of present disclosure, the method of radio communication is included in aggrieved party eNB place from infringing party eNB reception control signal, wherein, the transmission state of control signal instruction for representing the interference at aggrieved party eNB place, and dispatched the transmission be associated with aggrieved party eNB by aggrieved party eNB, with mitigate interference.

In the additional aspect of present disclosure, the device being arranged to radio communication comprises the unit measured for being obtained state quality by the infringing party eNB be associated with one or more network entity, for being measured based on described state quality by eNB, identify the unit of one or more aggrieved party's network entities of the interference suffered from asymmetric UL/DL time slot, and the unit for transmitting control signal to one or more network entity, wherein, described control signal is relevant with the alleviation of described interference.

In the additional aspect of present disclosure, the device being arranged to radio communication comprises for the unit at aggrieved party eNB place from infringing party eNB reception control signal, wherein, the transmission state of described control signal instruction for representing the interference at aggrieved party eNB place, and for being dispatched the transmission be associated with described infringing party eNB by described infringing party eNB, with the unit of mitigate interference.

In the additional aspect of present disclosure, computer program has the computer-readable medium of the code that has program recorded thereon thereon.This program code comprises for making computer obtain by the infringing party evolved node B (eNB) be associated with one or more network entity the code that state quality measures, for being measured based on described state quality by eNB, identify the code of one or more aggrieved party's network entities of the interference be subject to from asymmetric UL/DL time slot, and the code for transmitting control signal to one or more network entity, wherein, described control signal is relevant with the alleviation of interference.

In the additional aspect of present disclosure, computer program has the computer-readable medium of the code that has program recorded thereon thereon.This computer program code comprises for making the code of computer at aggrieved party eNB place from infringing party eNB reception control signal, wherein, the transmission state of control signal instruction for representing the interference at aggrieved party eNB place, and for being dispatched the transmission be associated with aggrieved party eNB by aggrieved party eNB, with the code of mitigate interference.

In the additional aspect of present disclosure, device comprises at least one processor and is coupled to the memory of processor.Described processor is configured to obtain state quality by the infringing party evolved node B (eNB) be associated with one or more network entity and measures, measured based on described state quality by eNB, identify one or more aggrieved party's network entities of the interference be subject to from asymmetric UL/DL time slot, and transmit control signal to one or more network entity, wherein, described control signal is relevant with the alleviation of interference.

In the additional aspect of present disclosure, device comprises at least one processor and is coupled to the memory of processor.Described processor is configured at aggrieved party eNB place from infringing party eNB reception control signal, wherein, the transmission state of control signal instruction for representing the interference at aggrieved party eNB place, and dispatched the transmission be associated with aggrieved party eNB by aggrieved party eNB, with mitigate interference.

Accompanying drawing explanation

Fig. 1 is the block diagram of the example conceptually illustrating mobile communication system.

Fig. 2 is the block diagram of the example conceptually illustrating downlink frame structure in mobile communication system.

Fig. 3 is the block diagram of the exemplary frame structure conceptually illustrated in up link LTE/-A communication.

Fig. 4 is the block diagram that the time division multiplexing (TDM) conceptually illustrated in heterogeneous network according to an aspect of present disclosure divides.

Fig. 5 is the block diagram of the design of base station/eNB and UE of the aspect configuration conceptually illustrated according to present disclosure.

Fig. 6 shows the block diagram of the time slot for two adjacent eNB.

Fig. 7 shows the functional block diagram of the example frame of the aspect being performed to realize present disclosure.

Fig. 8 shows the block diagram of a part for the cordless communication network of an aspect configuration according to present disclosure.

Fig. 9 A and Fig. 9 B shows the right block diagram of the infringing party/aggrieved party of the UE of aspect configuration according to present disclosure.

Figure 10 shows the sequential chart of the control signal between infringing party eNB and aggrieved party eNB configured according to an aspect of present disclosure.

Figure 11 shows the block diagram of infringing party and the aggrieved party UE group configured according to an aspect of present disclosure.

Figure 12 shows the block diagram divided according to the frequency division multiplexing (FDM) of an aspect configuration of present disclosure.

Figure 13 shows the block diagram of the eNB of an aspect configuration according to present disclosure.

Embodiment

The detailed description provided below in conjunction with accompanying drawing is intended to the explanation as various configuration, and is not intended to limit the scope of the disclosure.On the contrary, described detailed description comprises the detail of the object for the thorough understanding provided subject matter content.It will be apparent to one skilled in the art that not to be all need these details in each case, and in some cases, in order to carry out clear presenting, show known structure and parts in block diagram form.

Technology described herein may be used for various cordless communication network, such as CDMA, TDMA, FDMA, OFDMA, SC-FDMA and other network.Term " network " and " system " often can exchange use.Cdma network can realize such as general land wireless access (UTRA), telecommunications industry association (TIA's) deng wireless technology.UTRA technology comprises other distortion of wideband CDMA (WCDMA) and CDMA. technology comprises IS-2000, IS-95 and IS-856 from electronic industries alliance (EIA) and TIA.TDMA network can realize the wireless technology of such as global system for mobile communications (GSM).OFDMA network can realize the wireless technology of such as evolution UTRA (E-UTRA), Ultra-Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, flash OFDMA etc.UTRA and E-UTRA technology is a part of Universal Mobile Telecommunications System (UMTS).3GPP Long Term Evolution (LTE) and the LTE (LTE-A) improved are the more recent versions of the UMTS using E-UTRA.From be called as " third generation partner program " (3GPP) tissue document in describe UTRA, E-UTRA, UMTS, LTE, LTE-A and GSM.From be called as " third generation partner program 2 " (3GPP2) tissue document in describe and UMB.Technology described herein may be used for wireless network and wireless access technology above-mentioned, and other wireless network and wireless access technology.For the sake of clarity, describe in some of described technology for LTE or LTE-A (being referred to as in replacement scheme " LTE/-A ") below, and all use such LTE/-A term in the following most contents of specification.

Fig. 1 shows the wireless network 100 for communicating, and it can be LTE-A network.Wireless network 100 comprises multiple evolved node B (eNB) 110 and other network entity.ENB can be the station of carrying out with UE communicating, and can be called base station, Node B, access point etc.Each eNB 110 can provide the communication overlay for specific geographical area.In 3 gpp, term " community " can refer to this specific geographic overlay area of eNB and/or serve the eNB subsystem of described overlay area, and this depends on the linguistic context that described term uses.

ENB can provide communication overlay for the community of macrocell, picocell, Femto cell and/or other type.Macrocell covers relatively large geographic area (a few km of such as radius) usually, and can allow to carry out unrestricted access by having with the UE of the service subscription of network provider.Picocell covers relatively little region usually, and can allow to carry out unrestricted access by having with the UE of the service subscription of network provider.Femto cell also covers relatively little geographic area (such as house) usually, and except unrestricted access, the restricted access undertaken by the UE be associated with Femto cell (UE etc. of the UE such as, in closed user group (CSG), the user in house) can also be provided.ENB for macrocell can be called grand eNB.ENB for picocell can be called slight eNB.And the eNB for Femto cell can be called femto eNB or family eNB.In the example shown in fig. 1, eNB 110a, eNB 110b and eNB110c are the grand eNB for macrocell 102a, macrocell 102b and macrocell 102c respectively.ENB110x is the slight eNB for picocell 102x.And eNB 110y and eNB 110z is the femto eNB for Femto cell 102y and Femto cell 102z respectively.ENB can support one or more (such as two, three, four etc.) community.

Wireless network 100 can support simultaneous operation or asynchronous operation.For simultaneous operation, eNB can have similar frame timing, and can align approx in time from the transmission of different e NB.For asynchronous operation, eNB can have different frame timings, and can not align in time from the transmission of different e NB.

UE 120 is dispersed in whole wireless network 100, and each UE can be fixing or movement.UE can also be called terminal, mobile radio station, subscriber unit, stand.UE can be cell phone, personal digital assistant (PDA), radio modem, Wireless Telecom Equipment, handheld device, panel computer, kneetop computer, cordless telephone, wireless local loop (WLL) are stood.UE can communicate with grand eNB, slightly eNB, femto eNB, repeater etc.In FIG, have the transmission of the expectation between the solid line instruction UE of double-head arrow and service eNB, it is UE service on the downlink and/or uplink that described service eNB is designated as.The dotted line with double-head arrow indicates the interference between UE and eNB to transmit.

LTE/-A utilizes OFDM (OFDM) on the uplink, and utilizes single carrier frequency division multiplexing (SC-FDM) on uplink.System bandwidth is divided into multiple (K) orthogonal sub-carriers by OFDM and SC-FDM, and it is also called tone, frequency range etc. usually.Data can be utilized to modulate each subcarrier.Generally speaking, utilize OFDM to send modulation symbol in a frequency domain, and utilize SC-FDM to send modulation symbol in the time domain.Interval between adjacent sub-carrier can be fixing, and the sum of subcarrier (K) can depend on system bandwidth.Such as, for the system bandwidth of corresponding 1.4 megahertzes (MHz), 3MHz, 5MHz, 10MHz, 15MHz or 20MHz, K can equal 72,180,300,600,900 and 1200 respectively.System bandwidth can also be divided into subband.Such as, subband can cover 1.08MHz, and for the system bandwidth of corresponding 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz or 20MHz, can there is 1,2,4,8 or 16 subband respectively.

Fig. 2 shows for the downlink frame structure in LTE/-A.Transmission time axle for down link can be divided into the radio frames of multiple unit.Each radio frames can have the predetermined duration (such as 10 milliseconds (ms)), and can be divided into 10 subframes with index 0 to 9.Each subframe can comprise two time slots.Therefore each radio frames can comprise 20 time slots with index 0 to 19.Each time slot can comprise L symbol period, such as, for general cyclic prefix (as shown in Figure 2) 7 symbol periods, or for 6 symbol periods of extended cyclic prefix.2L symbol period in each subframe can be assigned with the index of 0 to 2L-1.Available temporal frequency resource can be divided into Resource Block.Each Resource Block can cover N number of subcarrier (such as 12 subcarriers) in one time slot.

In LTE/-A, for each community in eNB, eNB can send master sync signal (PSS) and auxiliary synchronous signals (SSS).As shown in Figure 2, can respectively there is the subframe 0 of each radio frames of general cyclic prefix and subframe 5 each in symbol period 6 and symbol period 5 in send master sync signal and auxiliary synchronous signals.Synchronizing signal can be used for cell detection by UE and catch.ENB can send Physical Broadcast Channel (PBCH) by the symbol period 0 in the time slot 1 of subframe 0 in symbol period 3.PBCH can carry some system information.

As finding in fig. 2, physical control format indicator channel (PCFICH) can be sent in the first symbol period of each subframe.PCFICH can transmit the quantity (M) of the symbol period for control channel, and wherein M can equal 1,2 or 3 and can change along with subframe.For mini system bandwidth, be such as less than 10 Resource Block, M can also equal 4.Shown in figure 2 in example, M=3.ENB can send physics HARQ indicator channel (PHICH) and physical downlink control channel (PDCCH) in initial M symbol period of each subframe.PDCCH and PHICH is also included in 3 the initial symbol periods in example shown in figure 2.PHICH can carry the information for supporting mixed automatic retransfer (HARQ).PDCCH can carry the information about the Resourse Distribute for UE and the control information for downlink channel.ENB can send physical down link sharing channel (PDSCH) in the residue symbol period of each subframe.PDSCH can carry the data for being scheduled for the UE carrying out transfer of data on the uplink.

Except sending except PHICH and PDCCH in the control section (i.e. the first symbol period of each subframe) of each subframe, LTE-A can also send the channel that these control guiding in the data division of each subframe.As shown in FIG. 2, these new control design case utilize data area, and such as relaying physical downlink control channel (R-PDCCH) and relaying physics HARQ indicator channel (R-PHICH) are included in each subframe symbol period below.R-PDCCH is the Novel control channel utilizing the data area developed in the environment of half-duplex operation of relays at first.The traditional PD CCH and PHICH, R-PDCCH and the R-PHICH that are different from some the initial control characters taken in a subframe are mapped to the resource element (RE) being originally designated as data area.New control channel can be the form of the combination of Frequency Division Duplexing (FDD) (FDM), time division duplex (TDM) or FDM and TDM.

ENB can send PSS, SSS and PBCH at the center 1.08MHz of the system bandwidth used by eNB.ENB can send wherein in each symbol period of these channels, crosses over whole system bandwidth and sends PCFICH and PHICH.PDCCH can be sent to UE in groups by eNB in some part of system bandwidth.PDSCH can be sent to particular UE by eNB in the specific part of system bandwidth.PSS, SSS, PBCH, PCFICH and PHICH can be sent to all UE with broadcast mode by eNB, with mode of unicast, PDCCH can be sent to particular UE, and in the mode of clean culture, PDSCH can be sent to particular UE.

In each symbol period, multiple resource element can be available.Each resource element can cover a subcarrier in a symbol period, and can be used to transmission modulation symbol, and described modulation symbol can be real number value or complex values.The resource element not being used to reference signal in each symbol period can be arranged in resource element group (REG).Each REG can comprise four resource elements in a symbol period.PCFICH can take four REG in symbol period 0, and described four REG can crossover frequency separate with carrying out approximately equal.PHICH can take 3 REG in one or more configurable symbol period, and described 3 REG can crossover frequency scatter.Such as, 3 REG for PHICH all can belong to symbol period 0 or can be dispersed in symbol period 0, symbol period 1 and symbol period 2.PDCCH can take and may select from 9 REG of available REG, 18 REG, 32 REG or 64 REG in an initial M symbol period.Only have some combination of REG just can be permitted for PDCCH.

UE can know the concrete REG for PHICH and PCFICH.UE can search the various combination of the REG for PDCCH.The quantity of the combination of searching typically is less than the quantity of the combination being permitted for PDCCH.In combination in any in the combination that eNB will be able to search at UE, PDCCH is sent to UE.

UE can be positioned within the covering of multiple eNB.In these eNB eNB can be selected to come for UE service.Service eNB can be selected based on various standard such as received power, path loss, signal to noise ratio (SNR) etc.

Fig. 3 shows the block diagram of the exemplary frame structure 300 in up link Long Term Evolution (LTE/-A) communication.Available resource block (RB) for up link can be divided into data division and control section.Control section can be formed in the Liang Ge edge of system bandwidth, and can have configurable size.Resource Block in control section can be assigned to UE for the transmission to control information.Data division can comprise all Resource Block be not included in control section.Design in Fig. 3 creates the data division comprising continuous print subcarrier, and this can allow the whole continuous print sub carries allocation in data division to single UE.

By the resource block assignments in control section to UE, can send control information to eNB for UE.By the resource block assignments in data division to UE, data can also be sent for UE to eNode B.UE can Resource Block 310a in distributed control section and Resource Block 310b send control information in Uplink Control Channel (PUCCH) physically.UE can Resource Block 320a in distributed data division and Resource Block 320b only send data or send both data and control information in ink Shared Channel (PUCCH) physically.Ul transmissions across two of a subframe time slot, and crossover frequency as shown in Figure 3 can carry out saltus step.

Refer again to Fig. 1, wireless network 100 uses the different set of eNB 110 (i.e. grand eNB, slightly eNB, femto eNB and repeater), improves the spectrum efficiency of the system of every unit area.Because wireless network 100 uses eNB different like this to cover for frequency spectrum, it can also be called heterogeneous network.Grand eNB 110a-c is usually carefully planned by the provider of wireless network 100 and is settled.Grand eNB 110a-c sends with high power levels (such as 5W-40W) usually.Can dispose the usual slight eNB 110x sent with quite low power level (such as 100mW-2W) in relatively unplanned mode, with the covering leak eliminated in the overlay area that provided by grand eNB 110a-c and the capacity improved in focus.Even so, but the femto eNB 110y-z typically disposed independent of wireless network 100 can be merged in the overlay area of wireless network 100, as the potential access point (if being permitted by their manager) to wireless network 100, or at least as can carry out with other eNB 110 of wireless network 100 activity communicating the coordination performing resource coordination and interference management and (aware) eNB of having perception.Femto eNB 110y-z also typically sends with the power level (such as 100mW-2W) being significantly less than grand eNB 110a-c.

In the operation of heterogeneous network, such as wireless network 100, each UE is served by the eNB 110 with better signal quality usually, and be received from other eNB 110, undesired signal by as interference.Operating principle although it is so may cause the performance of obvious suboptimum, but by using intelligent resource coordination, better server selection policies and the more advanced technology for efficient interference management between eNB110, in wireless network 100, achieve the gain on network performance.

The feature of slight eNB (such as slight eNB 110x) is compared to low-down transmitting power time grand eNB (such as grand eNB110a-c).Also often slight eNB is placed in network (such as wireless network 100) around in the mode of self-organizing.Due to this unplanned deployment, expect that the wireless network (such as wireless network 100) being mounted with slight eNB has the large region possessing low signal and disturbed condition, for to be positioned at overlay area or community edge UE (" cell edge " UE) control channel transmission for, this may cause the RF environment being more added with challenge.In addition, potential huge spread between the transmitted power level of grand eNB 110a-c and slightly eNB 110x (such as, be approximately 20dB) imply, in mixed deployment, the downlink coverage areas of slight eNB 110x is by the overlay area much smaller than grand eNB 110a-c.

But in uplink case, the signal strength signal intensity of uplink signal is controlled by UE, therefore, when the eNB 110 by any type receives, the signal strength signal intensity of uplink signal is all similar.Because the uplink coverage for eNB 110 is substantially same or similar, uplink handover boundary will be determined based on channel gain.This may cause not mating between downlink handover boundary and uplink handover boundary.When there is no extra network adjustment, described coupling, will make the association of server selection or UE to eNB in wireless network 100 than more difficult in the homogeneous network only having grand eNB, and in the homogeneous network only having grand eNB, downlink handover boundary and uplink handover boundary are closely mated.

If server is selected mainly based on downlink received signal intensity, the serviceability that so the mixing eNB of heterogeneous network (such as wireless network 100) disposes will be largely reduced.This is because, the larger overlay area of the grand eNB (such as grand eNB 110a-c) of higher-wattage limits the benefit that division has the cell coverage area of slight eNB (such as slight eNB 110x), because grand eNB 110a-c will attract all available UE compared with high downlink received signal strength, and eNB 110x can not be that any UE serves due to its very weak downlink transmitted power slightly.In addition, grand eNB110a-c may not have enough resources and come efficiently for those UE serve.Therefore, wireless network 100, by the overlay area by the slight eNB 110x of expansion, is attempted effectively balancing grand eNB 110a-c and the load slightly between eNB 110x.This concept is called cell range expansion (CRE).

Wireless network 100 determines by changing the mode that server is selected wherein, obtains CRE.Replace by the selection of server based on downlink received signal intensity, select more based on the quality of down link signal.Such based in the determination of quality at one, server is selected can based on determining eNB minimal path loss being supplied to UE.In addition, wireless network 100 provides fixing resource division between grand eNB 110a-c and slight eNB 110x.But, even if having this effective load balance, should be the UE served by slight eNB (such as slightly eNB 110x) and alleviate dl interference from grand eNB 110a-c.This can be realized by various method, comprises the resource coordination etc. between the interference elimination at UE place, eNB 110.

In the heterogeneous network (such as wireless network 100) with cell range expansion, service is obtained from the eNB (such as slight eNB 110x) of lower-wattage in order to make UE, send from the stronger down link signal of the eNB (such as grand eNB 110a-c) of higher-wattage in existence, slight eNB 110x is devoted to the main interference coordination disturbed between eNB in control channel and data channel and grand eNB 110a-c.Many different technology for interference coordination can be adopted to manage interference.Such as, Inter-Cell Interference Coordination (ICIC) can be used to reduce the interference of the community in disposing from cochannel.A kind of ICIC mechanism is that adaptive resource divides.Adaptive resource divides sub-frame allocation to some eNB.In the subframe distributing to an eNB, adjacent eNB does not send.Therefore, the interference that the UE served by an eNB experiences is lowered.Sub-frame allocation can be performed on uplink channel and downlink channel.

Such as, subframe can be distributed between three class subframes: shielded subframe (U subframe), forbidden subframe (N subframe) and common subframe (C subframe).Shielded subframe is assigned to an eNB, is only used by an eNB.Based on the interference not from adjacent eNB, shielded subframe can also be called " idle " subframe.Forbidden subframe distributes to the subframe of adjacent eNB, and an eNB sends data during being inhibited in forbidden subframe.Such as, the forbidden subframe of an eNB can correspond to the shielded subframe of the second interference eNB.Therefore, an eNB is the unique eNB sending data during the shielded subframe of an eNB.Common subframe may be used for carrying out transfer of data for multiple eNB.Due to the possibility of the interference from other eNB, common subframe can also be called " busy " subframe.

At least one shielded subframe is that each cycle is distributed statically.In some cases, a shielded cycle is only had to distribute statically.Such as, if one-period is 8 milliseconds, so during every 8 milliseconds, a shielded subframe can be distributed to eNB statically.Other subframe can dynamically be distributed.

The subframe that adaptive resource division information (ARPI) allows non-static to distribute is statically allocated.Any one in shielded subframe, forbidden subframe or common subframe can be dynamically allocated (being respectively AU, AN, AC subframe).Dynamic assignment can promptly change, such as every 100 milliseconds or less.

Heterogeneous network can have the eNB of different capacity grade.Such as can define three power grades, be grand eNB, slightly eNB and femto eNB according to the power grade order reduced.When grand eNB, slightly eNB and femto eNB are in cochannel deployment, the power spectrum density (PSD) of grand eNB (infringing party eNB) may be greater than the PSD of slight eNB and femto eNB (aggrieved party eNB), causes a large amount of interference to slight eNB and femto eNB.Shielded subframe can be used with the interference reduced or minimize slight eNB and femto eNB.That is, shielded subframe can be scheduled for aggrieved party eNB, to correspond to the forbidden subframe on infringing party eNB.

Fig. 4 is the block diagram that the time division multiplexing (TDM) shown in heterogeneous network according to an aspect of present disclosure divides.The first row square frame shows the sub-frame allocation for femto eNB, and the second row square frame shows the sub-frame allocation for grand eNB.Each in eNB has static shielded subframe, and during this period, other eNB has static forbidden subframe.Such as femto eNB has shielded subframe (U subframe) in subframe 0, and it corresponds to the forbidden subframe (N subframe) in subframe 0.Similarly, grand eNB has shielded subframe (U subframe) in subframe 7, and it corresponds to the forbidden subframe (N subframe) in subframe 7.Subframe 1-6 is dynamically allocated for shielded subframe (AU), forbidden subframe (AN) and common subframe (AC).The common subframe (AC) of dynamically distributing period in subframe 5 and subframe 6, slight eNB and grand both eNB can send data.

Because infringing party eNB is prohibited to send, shielded subframe (such as U/AU subframe) has the interference of reduction and higher channel quality.Forbidden subframe (such as N/AN subframe) does not have transfer of data under low interference level, to send data to allow aggrieved party eNB.Common subframe (such as C/AC subframe) has the channel quality of the quantity depending on the adjacent eNB sending data.Such as, if adjacent eNB sends data in common subframe, the channel quality of so common subframe can be lower than the channel quality of shielded subframe.For cell range expansion (CRE) UE had a strong impact on by infringing party eNB, the channel quality in common subframe can also be lower.CRE UE can belong to an eNB, but can also be positioned at the overlay area of the 2nd eNB.Such as, the UE carrying out communicating with the grand eNB of the range limit covered near femto eNB is CRE UE.

Another exemplary interference management scheme that can use in LTE/-A is adaptive disturbance management at a slow speed.Make to carry out interference management in this way, resource is being held consultation in the time frame of scheduling interval and distributing.The target of described scheme is finding on maximized for the total utility of network free and frequency resource for all combinations carrying out the transmitting power of eNB and UE sent." effectiveness " can be that the delay of flowing according to user data rate, service quality (QoS) and fairness metric define.Such algorithm can be calculated by central entity, and described central entity has the access to the full detail for solving described optimization, and has the control to the entity all sent.This central entity may not be always actual or or even desirable.Therefore, in alternative aspect, can use distributed algorithm, described distributed algorithm is made the utilization of resources based on the channel information from certain node set and is determined.Therefore, or using central entity or by being distributed to by described algorithm on the various node/entity setses in network, adaptive disturbance algorithm at a slow speed can be used.

In the deployment of heterogeneous network (such as wireless network 100), UE can work in dominant interference scenario, and UE can observe from one or more strong jamming producing the eNB of interference in described dominant interference scenario.Dominant interference scenario may occur due to restricted association.Such as, in FIG, UE 120y near femto eNB 110y, and may can have high received power for eNB 110y.But, due to restricted association, UE 120y may not access femto eNB110y, and can be connected to grand eNB 110c (as shown in FIG. 1) afterwards or be connected to the femto eNB 110z (not showing in FIG) also with lower received power.Then UE 120y can observe the strong jamming from femto eNB 110y on the uplink, and can cause the strong jamming to eNB 110y on uplink.Use the interference management coordinated, eNB 110c and femto eNB 110y can at the enterprising Serial Communication of backhaul 134 to consult resource.In negotiation, femto eNB110y agrees to terminate in the transmission on a channel resource in its channel resource, can not experience the as many interference from femto eNB 110y when being communicated with eNB 110c by same channel with it to make UE 120y.

Except the deviation of the signal power that UE place in such dominant interference scenario observes, due to the different distance between UE and multiple eNB, even if in synchro system, the time delay of down link signal also can be observed by UE.ENB in synchro system estimates synchronous in leap system.But such as, consider the UE apart from grand eNB 5 km place, the propagation delay of any down link signal received from grand eNB will be delayed by general 16.67 μ s (5km ÷ 3x 10 ⁸, i.e. the light velocity " c ").By the down link signal from grand eNB compared with the down link signal from nearer femto eNB, time (timing) difference may be close to the level of life span (TTL) mistake.

In addition, the interference that such time difference may affect UE place is eliminated.The cross-correlation characteristics between the combination of the multiple versions usually using identical signal is eliminated in interference.More easily interference can be identified, because although each copy of signal may have interference, interference can not in same position by the multiple copies combining identical signal.Use the crossing dependency of composite signal, actual signal section can be determined and it is distinguished from interference, therefore, allowing described interference to be eliminated.

Fig. 5 shows the block diagram of the design of base station/eNB 110 and UE 120, and described base station/eNB 110 can be one in the base station/eNB in Fig. 1, and described UE 120 can be one in UE in Fig. 1.For restricted association scene, eNB 110 can be the grand eNB in Fig. 1, and UE 120 can be UE 120y.ENB 110 can also be the base station of some other types.ENB 110 can be equipped with antenna 534a to antenna 534t, and UE 120 can be equipped with antenna 552a to antenna 552r.

At eNB 110, launching processor 520 can receive data from data source 512, and from controller/processor 540 receiving control information.Control information may be used for PBCH, PCFICH, PHICH, PDCCH etc.Data may be used for PDSCH etc.(such as encoding and sign map) data that transmitting processor 520 can process and control information are to obtain data symbol and control character respectively.Launch processor 520 and can also produce reference symbol (such as PSS, SSS) and cell special reference.As being suitable for, launch (TX) multiple-input and multiple-output (MIMO) processor 530 and can perform spatial manipulation (such as precoding) (if words applicatory) to data symbol, control character and/or reference symbol, and output symbol stream can be provided to modulator (MOD) 532a to 532t.Each modulator 532 can process respective output symbol stream (such as OFDM etc.) to obtain output sample streams.Each modulator 532 can process further (such as, being transformed into simulation, amplification, filtering and up-conversion) exports sample streams to obtain down link signal.The down link signal of automodulation device 532a to modulator 532t can be sent respectively via antenna 534a to antenna 534t.

At UE 120 place, the signal received from eNB 110 receiving downlink signal, and can be supplied to demodulator (DEMOD) 554a to demodulator 554r by antenna 552a to antenna 552r respectively.Each demodulator 554 can regulate (such as, filtering, amplification, down-conversion and digitlization) respective Received signal strength to obtain input sample.Each demodulator 554 can process input sample (such as OFDM etc.) further to obtain the symbol received.If words applicatory, MIMO detector 556 can obtain the symbol received from whole demodulator 554a to demodulator 554r, detects and provide the symbol detected to the semiology analysis MIMO received.The data through decoding being used for UE 120 are supplied to data sink 560, and the control information through decoding are supplied to controller/processor 580 by the symbol that receiving processor 558 can process (such as demodulation, deinterleaving and decoding) detects.

On uplink, at UE 120 place, launch processor 564 can receive and process from data source 562 data (such as PUSCH) and carry out the control information (such as PUCCH) of self-controller/processor 580.Transmitting processor 564 can also produce the reference symbol for reference signal.If words applicatory, the symbol carrying out spontaneous emission processor 564 can also carry out precoding by TX MIMO processor 566, is further processed and is sent to eNB 110 by demodulator 554a to 554r (such as SC-FDM etc.).At eNB 110 place, if words applicatory, uplink signal from UE 120 can be received by antenna 534, processed by modulator 532, detected by MIMO detector, and be further processed to obtain the data through decoding and control information that are sent by UE 120 by receiving processor 538.Data through decoding can be supplied to data sink 539 by processor 538, and the control information through decoding is supplied to controller/processor 540.

Controller/processor 540 and controller/processor 580 can instruct operation at eNB 110 and UE 120 place respectively.Controller/processor 540 and/or other processor at eNB 110 place and module can perform or instruct the execution of the various processes for technology described herein.Controller/processor 580 and/or other processor at eNB 120 place and module can also perform or instruct the execution of the functional block illustrated in figs. 8 and 9 and/or other process for technology described herein.Memory 542 and memory 582 can store data for eNB 110 and UE 120 and program code respectively.Scheduler 544 can dispatch UE for carrying out transfer of data on the downlink and/or uplink.

In time division duplex (TDD) system, can be applicable to real-time UL/DL business load dynamic/half dynamically UL/DL time slot configuration be considered to improve a kind of method of spectrum utilization.Fig. 6 shows the block diagram of the time slot for two adjacent eNB.Grand eNB uses the first time slot configuration transmission information in grand transmission frame 600.Adjacent slight eNB uses the second different time-gap to be configured in transmission information in slight transmission frame 601.Different time slot configuration produces the time slot of conflict, and so grand transmission frame 600 is in the work of UL time slot, and transmission frame 601 works at DL time slot slightly.But the different DL/UL time slot configuration (such as in time slot 602 and time slot 603) in neighbor cell may cause various interference problem, comprise the interference of eNB to eNB, wherein, the DL of eNB operates the interference causing receiving the UE UL of neighbor cell.Because the transmitting power of eNB significantly higher than the transmitting power of UE, may operate by DL the interference caused and can not ignore.The DL/UL time slot that UE also may lead to a conflict to the interference of UE.At UE in UE interference, UE UL transmission may disturb the UE DL of the UE served by neighbor cell to receive.If UE is close to each other, so this interference may be very strong.

The many aspects of present disclosure propose the interference mitigation solution processed eNB interference UE interference and eNB for UE.Fig. 7 shows the functional block diagram of the exemplary frame being performed as the aspect realizing present disclosure.At square frame 700 place, identify that the infringing party/aggrieved party by the network entity of UL/DL interference effect gathers.In selected, identify that infringing party/aggrieved party eNB gathers, and in other side, identify that infringing party/aggrieved party UE gathers.For the object of mobile management, UE measures the physical link of current service cell and neighbor cell, and to network-reporting Reference Signal Received Power (RSRP)/Reference Signal Received Quality (RSRQ).The UE of path loss measures and the signal strength signal intensity of different districts can be used to the potential infringing party/aggrieved party's network entity in different districts to classify.Can also identify by Operations, Administration and Maintenance (OAM) interface the eNB set producing interference in static state/semi-static configuration.

At square frame 701 place, send control signaling between the eNB of infringing party/aggrieved party's set.LTEICIC comprise can carry out sending between eNB by backhaul interface (such as X2 interface), for the various control signals of presence of intercell interference process.Such as, control signal comprises Relative Narrowband TX Power (RNTP), overload indicator (OI) and strong jamming designator (HII).RNTP information is typically sent to adjacent eNB.Described RNTP information in the downlink every Physical Resource Block (PRB) comprises 1 bit, indicates the transmitting power on PRB whether will be greater than given thresholding.Therefore, which frequency band is the adjacent eNB receiving RNTP it is expected to and will suffer more serious interference, and takes correct scheduling to determine immediately, and do not rely on the CQI from UE.Although eNB initiatively sends RNTP message, OI designator is that the strong jamming in uplink direction triggers when being detected by eNB.ENB will send OI to adjacent eNB, and the UE of described adjacent eNB is this strongly disturbing source potentially.OI message also comprise every PRB low, in or the instruction of high interference level.The RNTP message be similar to for DL for the HII of UL transmission carries out work.Every PRB has 1 bit instruction adjacent eNB whether should expect strong jamming power in the near future.Therefore, the typical PRB of cell edge UE is distributed in instruction.RSRP as a handover measurement report part measures and can also be used to identify cell edge UE.In a similar fashion, this designator is used to identify the frequency band in frequency allocation plan.

Refer again to square frame 701, in solving that UE disturbs UE, the eNB served for infringing party UE can by X2 interface to the eNB transmission HII message of serving for aggrieved party UE.For in solving that eNB disturbs eNB, infringing party eNB initiatively can send mark by the RNTP of the RB that uses and their Relative transmission power to aggrieved party eNB.When experiencing strong jamming in some RB, aggrieved party eNB can send OI message to infringing party eNB reactively.

At square frame 702 place, in response to the control signal sent, adjust transmission characteristic.Such as, when receiving RNTP message from infringing party eNB, aggrieved party eNB can not by use or weak jamming RB dispatches UL business.In addition, when receiving OI message from aggrieved party eNB, infringing party RB can reduce the DL power of corresponding RB.By the transmission to RNTP and OI message, infringing party eNB and aggrieved party eNB can consult transmitting power.

Fig. 8 shows the block diagram of the part of the cordless communication network 70 of an aspect configuration according to present disclosure.The part of shown cordless communication network 70 comprises the MeNB 805 of the grand eNB (MeNB) 800 of definition overlay area 806, the slight eNB (PeNB) 801 defining slight overlay area 807 and definition overlay area 808.Three UE, MUE 803, PUE 802 and MUE 804 are positioned at overlay area 806, overlay area 807 and overlay area 808, and one of them is inner.For MeNB800, PeNB 801 and MeNB805, time slot configuration is different, and it is asymmetric that this causes in UL/DL time slot (such as from subframe 602 or the subframe 603 of Fig. 6).Therefore, during identical time slot, MUE 803 is scheduled for the UL of MeNB 800, and PUE 802 is scheduled for the DL from PeNB801, and MUE 804 is scheduled for the UL of MeNB 805.The UL dispatched from MUE 803 and MUE 804 communicate produce relevant from PeNB 801 to PUE 802 the interference that communicates of DL.Due to compared with MUE 804, MUE 803 is relatively close to PUE 802, so the DL interference of 802 is stronger from MUE803 to PUE.In addition, the DL communication from PeNB 801 also may cause disturbing with MeNB 800 and MeNB 805, and described MeNB 800 and MeNB 805 receive their respective UL from MUE803 with MUE 804 and communicate.Therefore, the selected aspect of present disclosure is for alleviating by the asymmetric UE caused in the UL/DL time slot of PeNB 802 and MeNB 803-804 the interference of UE.The eNB that the additional aspect of present disclosure causes for the UL/DL asymmetry by PeNB 801 and MeNB 800 and MeNB 805 is to the interference of eNB.

As previously mentioned, UE measures the physical link of current area and neighbor cell, and RSRP/RSRQ is reported to network.Fig. 9 A and Fig. 9 B shows the right schematic diagram of the infringing party/aggrieved party of the UE of aspect configuration according to present disclosure.In Fig. 9 A and Fig. 9 B, eNB 902 is the service eNB for UE 900, and eNB 903 is the service eNB for UE 901.

First illustrative aspects of the present disclosure shown in Fig. 9 A and Fig. 9 B, the asymmetric interference created for aggrieved party UE 901 of UL/DL time slot.Particularly, due to from infringing party UE 900 to eNB 902 UL transmission, cause UL/DL asymmetric from eNB 903 to the DL of aggrieved party UE 901 transmit produce interference.

In the normal processes that mobile management is measured, infringing party UE measures the path loss that it arrives eNB 902, its service eNB and eNB 903, and state quality measurement is sent to its service eNB, eNB 902 and adjacent eNB, such as, and eNB 903.In figures 9 b and 9, aggrieved party UE 901 measures the path loss that it arrives eNB 903, its service eNB and eNB 902, and state quality measurement is sent to its service eNB, eNB 903.In certain embodiments, UE also can send state quality to adjacent eNB (such as eNB 902) and measure, or state quality can be measured relaying to adjacent eNB (such as eNB 902) by service eNB 903.Arranging based on the network measure of measuring for measuring various state quality, requiring that infringing party/aggrieved party UE measures to their Serving cell and they possible neighbor cell their path loss of report.Use these state quality measurement reports, network can be gathered by the potential infringing party/aggrieved party UE of classification/recognition, and the path loss that described potential infringing party/aggrieved party UE gathers infringing party and the aggrieved party is similar.Identify more accurately to make, the Serving cell of infringing party/aggrieved party UE can configure described measurement with synchronous/half method of synchronization.

When from aggrieved party UE 901 to eNB 903 path loss close to or the path loss that is less than from infringing party UE900 to eNB 903, and when the path loss of combination measures the degree of approach of instruction infringing party UE 900 to aggrieved party UE 901, network reception path loss is measured and is determined that aggrieved party UE901 is the aggrieved party, and infringing party UE 900 is infringing parties.When these conditions are satisfied, network can identify that infringing party/aggrieved party UE gathers.

Second illustrative aspects of the present disclosure shown in Fig. 9 A and Fig. 9 B, the asymmetric generation of UL/DL time slot is for the interference of aggrieved party eNB 902.Particularly, due to from infringing party eNB 903 to UE 901 DL transmission, cause the asymmetric generation of UL/DL from infringing party UE 900 to the UL of aggrieved party eNB 902 interference.

When UE is configured to take various state quality to measure, such as RSRP/RSRQ, path loss etc., these state quality measurement results can be used to infringing party/aggrieved party eNB and gather identification.When from UE 901 to the path loss of infringing party eNB 903 close to and the path loss be less than from UE 900 to aggrieved party eNB903, and when the path loss merged measures the degree of approach of instruction UE 900 to UE 901, network determines that aggrieved party eNB 902 is aggrieved parties, and infringing party eNB 903 is infringing parties.The eNB of such as eNB 902 and eNB 903 can be configured to perform similar state quality and measure, such as path loss.Use similar condition, network considers that the path loss correlation between infringing party eNB and potential aggrieved party eNB is measured, to determine infringing party/aggrieved party's set of eNB.When these conditions are satisfied, network can identify that infringing party/aggrieved party eNB gathers.When not having UE to be arranged to such state quality measurement, these measurement results can also be shared with community to determine that infringing party/aggrieved party eNB gathers.The eNB with low pathloss can be classified as infringing party/aggrieved party couple.

It should be pointed out that in the additional aspect of present disclosure, one identifies its DL by the extra method of the aggrieved party UE of potential UE UL communication severe jamming based on two CQI.Two CQI ability is current to be present in LTE standard.Utilize this configuration, UE is configured to the CQI of report two type, and the CQI of described two types corresponds to and can experience temporal mode that UE disturb UE and experience temporal mode that is a small amount of or that disturb UE without UE.If the large difference between UE two CQI instruction CQI, so UE may experience the interference from another UE, and therefore should be scheduled causing not having in noisy time slot due to asymmetric DL/UL configuration.

The identification that infringing party/aggrieved party eNB gathers allows network between infringing party eNB transmission period, apply the scheduling mechanism of interference coordination and coordination between eNB.Should it is further noted that, except disturbing the solution based on measurement described above to eNB about the eNB configured based on asymmetric D L/UL, can via Operations, Administration and Maintenance (OAM) interface, self-organizing network (SON) or other method provide static state/semi-static configuration, to identify that infringing party/aggrieved party eNB gathers.

Figure 10 shows the sequential chart of the control signal between infringing party eNB 1000 and aggrieved party eNB 1001 configured according to an aspect of present disclosure.Along with switch cycles is opened, at time 1002 place, start open loop power setting up procedure, wherein, infringing party eNB 1000 identifies arbitrary aggrieved party eNB, such as aggrieved party eNB 1001.Then infringing party eNB 1000 can start the negotiation with the initial transmission power of identified aggrieved party eNB.At time 1003 place, infringing party eNB1000 measures its path loss, and result is sent to aggrieved party eNB 1001 together with switch slotted mode and time started.In response to receiving information on path loss, aggrieved party eNB 1001 the time 1004 place its load and interference level are sent to infringing party eNB 1000.At time 1005 place, infringing party eNB 1000 is based on the interference experienced at aggrieved party eNB 1001 place and determine transmitting power to the measurement of the path loss of aggrieved party eNB1001.Select initial transmitting power, minimize to make the impact on the UL of aggrieved party eNB 1001 receives.

Then the closed power adjustment process with Inter-Cell Interference Coordination is started.At time 1006 place, RNTP message can be sent to aggrieved party eNB1001 with aspect by infringing party eNB 1000 on one's own initiative, and described RNTP message identifier infringing party eNB 1000 is intended to RB (if so talking about) and their Relative transmission power of use.Then aggrieved party eNB 1001 can use RNTP message, to expect which frequency band will have more serious interference, and makes scheduling decision intelligently at more serious near band.Such as, aggrieved party eNB 1001 can not dispatched UL business by the RB that uses or the RB with weak jamming.Along with aggrieved party eNB 1001 transmits based on the UE for the UE served by adjacent eNB, the interference in RB detected, aggrieved party eNB 1001 is in the place's generation of time 1007 and time 1008 and send OI message.Then infringing party eNB 1000 can use the information in OI message to instruct interference UE, to reduce transmitting power or the UL transmission of reschedule on corresponding RB.According to this process, the transmitting power based on RNTP and OI consults to exchange as required, and can use the adjustment response of these signals being produced to the transmitting power to infringing party eNB 1000.The dynamic change of maneuvering load, user's geometry etc. can mitigate interference.

Figure 11 shows the block diagram of infringing party the UE 1100 and aggrieved party 1103 configured according to an aspect of present disclosure.In fig. 11, eNB 1101 is the service eNB for UE 1100, and eNB 1102 is the service eNB for UE 1103.In addition, eNB 1101 can communicate via X2 interface 1104 with eNB 1102.

In fig. 11, Network Recognition from infringing party UE 1100 to eNB 1101 UL transmission, described UL transmission receives the aggrieved party UE 1103DL from eNB 1102 and causes strong jamming.Once identify such infringing party/aggrieved party's set, for the Serving cell (eNB1101) of infringing party UE 1100, the HII of ICIC mechanism indicates the neighbor cell (eNB 1102) be extended to as aggrieved party UE (such as aggrieved party UE 1103) serves.HII is notified that 1105 send to eNB 1102 by backhaul X2 interface 1104 by eNB 1101.When receiving HII from eNB 1101 and notifying 1105, eNB 1102 can dispatch other UE during those disturb RB or serious aggrieved party UE 1103 in different frequencies or RB, minimizes to make the interference effect of UE to UE.

In response to wherein exist based on the UE of asymmetric UL/DL, to the control signal between the community of the interference of eNB, transmission characteristic is adjusted to the interference of UE or eNB time, can utilize and specifically dispatch with the impact of mitigate interference.In the interference scene of UE to UE, the service eNB of infringing party can avoid the scheduling to potential infringing party in conflict time slot, disturbs the strong UE of aggrieved party UE to alleviate to UE.Alternatively or additionally, the service eNB of aggrieved party UE can avoid the scheduling to potential aggrieved party UE in conflict time slot, so that the strong UE alleviated from infringing party UE disturbs UE.

Disturb in scene eNB at eNB, some different scheduling mechanisms can be used to alleviate described interference.Figure 12 shows the block diagram divided according to the frequency division multiplexing (FDM) of an aspect configuration of present disclosure.In conflict time slot, according to the frequency relevant with the transmission information of aggrieved party eNB 1201, the transmission information of infringing party eNB 1200 can be divided.Such as, infringing party eNB 1200 only dispatches public reference signal (CRS) in the frequency at time slot edge 1202 and time slot edge 1204 place.The centre frequency place of the heart 1203 dispatches the data transmitted for DL in a slot.Dispatch the corresponding time slot for aggrieved party eNB 1201, to send UL data at the frequency place of time slot edge 1205 and time slot edge 1206.When without any transmission information, scheduling corresponds to the frequency of the slot center 1206 of the time slot of the aggrieved party eNB 1201 of slot center 1203.Therefore, the conflict time slot be scheduled will not comprise the data of conflicting in corresponding frequency of transmission.

In time division multiplexing (TDM) configuration, infringing party/aggrieved party eNB can dispatch DL/UL transmission in a tdm fashion.Such as, under the background that the UL from aggrieved party eNB UL transmits, conflict may occur due to the PUCCH message of the ACK/NACK of the DL for being provided for aggrieved party eNB place.In order to overcome the possible interference in such ACK/NACK UL PUCCH transmits, HARQ time shaft can be changed.But, the current change that may need transmission standard of such solution.Another potential solution can be dispatch ACK/NACK transmission according to FDM method, as above about shown by Figure 12 and description.

Under the background that the DL from infringing party eNB transmits, when infringing party eNB be can the slight eNB of executing state mass measurement time, the slight eNB of infringing party can dynamically decode for the UL Grant information of aggrieved party eNB, and uses the information through decoding to carry out scheduled transmission with the interference that avoids conflict.Alternatively, DL/UL TDM can be used to divide and to adopt semi-static solution.An illustrative aspects, grand eNB periodically can notify to slight eNB via X2 interface: based on its business/loading condition, the UL transmission whether conflict subframe will be used to.In another illustrative aspects, conflict DL sub-frame configuration, based on the signal from grand eNB, is almost blank subframe (ABS) by the slight eNB of infringing party.ABS subframe does not send any Traffic Channel usually, and major part has very lower powered control channel frame.Almost blank resource is the available resources of the ABS subframe that can utilize low volume data traffic interference to use.Further, blank can be dispatched to conflict UL subframe by aggrieved party eNB.The various aspects of present disclosure are not limited to for alleviating because asymmetric UL/DL conflicts any concrete scheduling of interference that time slot causes.

Figure 13 shows the block diagram of the exemplary eNB 110 of an aspect configuration according to present disclosure.ENB 110 comprises controller/processor 540, and the firmware that its execution is stored in memory 542 and software are to operate characteristic and the function of eNB 110.The various parts of the eNB 110 of these characteristics of control realization gone back by controller/processor 540.When eNB 110 is infringing party eNB, received to antenna 534t by antenna 534a, the demodulation of modulator/demodulator 532a-t place, the signal everywhere managed at receiving processor 538, analyzed by the controller/processor 540 performing the infringing party/aggrieved party's algorithm 1300 be stored in memory 542.Infringing party/aggrieved party's algorithm 1300 analytic signal is measured, to determine to experience the one or more aggrieved party eNB from the interference of asymmetric UL/DL time slot configuration.The combination of these parts and action provides the unit of at least one aggrieved party eNB for identifying the interference suffered from the asymmetric UL/DL time slot with infringing party eNB.

Once identify aggrieved party eNB, can via antenna 534a to antenna 534t, modulator/demodulator 532a to modulator/demodulator 532t, receiving processor 538 receives current reception quality information, and described current reception quality information can be used for arranging through-put power by controller/processor 540.The combination of these parts and action provides for based on the current reception quality information being received from least one aggrieved party eNB, arranges the unit of initial transmission power.

Controller/processor 540, by the control signal application 1301 in reference to storage 542, produces control signal, such as RNTP.Then produced signal is modulated at modulator/demodulator 532a to modulator/demodulator 532t place, and is sent to antenna 534t by antenna 534a.The combination of these parts and action provides the unit for the first control signal to be sent at least one aggrieved party eNB from infringing party eNB, the described first control signal one or more transmitting RB of mark and Initial Trans.

When carrying out work as aggrieved party eNB, eNB 110 by antenna 534a to antenna 534t, modulator/demodulator 532a to modulator/demodulator 532t and receiving processor, can receive control signal from infringing party eNB.Controller/processor 540 reads and is included in the RB be identified in control signal and initial transmission power by infringing party eNB.The combination of these parts and action provides the unit for receiving the first control signal from infringing party eNB, one or more transmitting RB of described first control signal mark infringing party eNB and Initial Trans.

Controller/processor 540 uses control signal and dispatches the ul transmissions in (using scheduler 544) RB for the transmitting power of the mark of identified transmitting RB, the interference that described RB experience is more weak, or avoid the corresponding transmitting RB identified in control signal.The combination of these parts and action provides for dispatching one or more UE of being served by aggrieved party eNB for ul transmissions, to alleviate the unit of the interference to one or more transmitting RB.

In the additional aspect of present disclosure, when being configured to service infringing party UE, eNB 110 is by antenna 534a to antenna 534t accepting state mass measurement 1302, it can carry out demodulation by modulator/demodulator 532a to modulator/demodulator 532t, and process at receiving processor 538 place, and can be stored in memory 542.The combination of these parts and action provides the unit of the state quality measurement for the one or more aggrieved party UE served in infringing party UE and next freely one or more adjacent eNB of eNB place reception next free eNB service.

In this additional aspect, controller/processor 540 performs the infringing party/aggrieved party's algorithm 1300 be stored in memory 542 afterwards, to compare and analysis state mass measurement.The result of infringing party/aggrieved party's algorithm 1300 is identified at the aggrieved party UE served in neighbor cell.The combination of these parts and action provides for measuring based on state quality, identifies the unit of one or more aggrieved party UE.

Because aggrieved party UE is identified, eNB 110 accesses the control signal application 1301 be stored in memory 542 under the control of controller/processor 540, to produce the control signal (such as HII) for neighbor cell.Controller/processor 540 transmits control signal to neighbor cell, and described controller/processor 540 first at modulator/demodulator 532a to modulator/demodulator 532t place modulation signal, and is sent to antenna 534t by antenna 534a afterwards.The combination of these parts and action provides the unit for transmitting control signal to one or more adjacent eNB, and described control signal indicates the strong jamming of the expection be associated with the one or more up link RB distributing to infringing party UE.

When eNB operates as the adjacent eNB for one of them service of aggrieved party UE, control signal is received at antenna 534a to antenna 534t place, demodulated at modulator/demodulator 532a to modulator/demodulator 532t place, and processed at receiving processor 538 place.The combination of these parts and action provides the unit for receiving at eNB place from the control signal of the service eNB of serving for infringing party UE, wherein, described control signal indicates the strong jamming expected by the service eNB be associated with the one or more up link RB distributing to infringing party UE.

Controller/processor 540 utilizes scheduler 544 to use the control signal received, and under the control of controller/processor 540, the UE that scheduling eNB 110 is serving, alleviates the dl interference that may be caused by the ul transmissions of infringing party UE.Under the control of controller/processor 540, the scheduling signals carrying out child scheduler 544 is sent to object UE, described controller/processor 540 first at modulator/demodulator 532a to modulator/demodulator 532t place modulation signal, and is sent to antenna 534t by antenna 534a afterwards.The combination of these parts and action provides the one or more UE for dispatching in the service of eNB place, to alleviate the unit of the interference at one or more UE caused by the ul transmissions from infringing party UE.

Any one that one skilled in the art will appreciate that information and signal can use in multiple different technique and technology represents.Such as, run through data that above specification quotes, instruction, order, information, signal, bit, symbol and chip to be represented by voltage, electric current, electromagnetic wave, magnetic field or magnetic particle, light field or light particle or their combination in any.

Functional block in Fig. 7 and module can comprise processor, electronic equipment, hardware device, electronic unit, logical circuit, memory, software code, firmware code etc. or their combination in any.

Those skilled in the art will recognize further, can be implemented as electronic hardware, computer software or the combination of the two in conjunction with multiple declaration box, module, circuit and algorithm steps herein described by disclosure.In order to be clearly shown that this interchangeability of hardware and software, the usual function round multiple declaration parts, frame, module, circuit and step is described them above.Hardware or software is embodied as, the design constraint depended on application-specific and apply over the whole system as this function.For often kind of specifically application, those of skill in the art can realize described function in the mode of accommodation, but such realization determines should not to be interpreted as to cause departing from the scope of present disclosure.

The various illustrative box, module and the circuit that describe in conjunction with disclosure herein can utilize general processor, digital signal processor (DSP), application-specific integrated circuit (ASIC) (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components or their combination in any being designed to perform function described herein realize or perform.General processor can be microprocessor, but in replacement scheme, processor can be any conventional processors, controller, microcontroller or state machine.Processor can also be embodied as the combination of computing equipment, such as, and the combination of the combination of DSP and microprocessor, multi-microprocessor, one or more microprocessor and DSP kernel or other such configuration any.

Step in conjunction with the method herein described by disclosure or algorithm can be embodied directly in the software module performed in hardware, by processor or in the combination of the two.Software module may reside in the storage medium of RAM memory, flash memory, ROM memory, eprom memory, eeprom memory, register, hard disk, removable dish, CD-ROM or other form any known in the field.Exemplary storage medium is coupled to processor, thus processor can from read information, and to storage medium written information.In the scheme substituted, storage medium can be integrated in processor.Processor and storage medium may reside in ASIC.ASIC may reside in user terminal.In the scheme substituted, processor and storage medium can be present in user terminal as discrete assembly.

In one or more exemplary design, the function of description can realize in hardware, software, firmware or its combination in any.If realized in software, then described function can as one or more instruction or code storage on a computer-readable medium, or send as one or more instruction or code.Computer-readable medium comprises both computer-readable storage medium and communication media, and described communication media comprises promotion computer program is sent to another place arbitrary medium from a place.Storage medium can be any usable medium that can be accessed by all-purpose computer or special-purpose computer.Nonrestrictive mode by way of example, such computer-readable medium can comprise RAM, ROM, EEPROM, CD-ROM or other optical disc storage, disk storage or other magnetic storage apparatus or may be used for carrying with the form of instruction or data structure or storing the program code unit of expectation, and other medium any that can be accessed by all-purpose computer or special-purpose computer or general processor or application specific processor.In addition, any connection can be called as computer-readable medium.Such as, if use coaxial cable, optical fiber cable, twisted-pair feeder, Digital Subscriber Line (DSL) or wireless technology (such as infrared ray, radio and microwave) from website, server or other remote source send software, then coaxial cable, optical fiber cable, twisted-pair feeder, DSL or wireless technology (such as infrared ray, radio and microwave) are included in the definition of medium.As used herein, disk and CD comprise compact disk (CD), laser-optical disk, CD, digital versatile disc (DVD), floppy disk and Blu-ray Disc, the wherein usual magnetically copy data of disk, CD then utilizes laser to carry out copy data optically usually.Combinations thereof also should be included in the scope of computer-readable medium.

The previous description of disclosure is provided, can implements to make any technical staff of this area or use present disclosure.For a person skilled in the art, will be apparent to the various amendments of present disclosure, and when not departing from the spirit or scope of present disclosure, the generic principles defined herein can be applied to other distortion.Therefore, present disclosure is not intended to be limited to example described herein and design, but meets the widest scope consistent with principle disclosed herein and novel features.

Claims

1. a method for radio communication, comprising:

Obtain state quality by the infringing party evolved node B (eNB) be associated with one or more network entity to measure;

Measured based on described state quality by described eNB, identify one or more aggrieved party's network entities of the interference suffered from asymmetric up link (UL)/down link (DL) time slot; And

Transmit control signal to described one or more network entity, wherein, described control signal is relevant with the alleviation of described interference.

2. method according to claim 1, wherein, described infringing party eNB comprises the eNB served for infringing party subscriber equipment (UE), and wherein, described infringing party UE is one in described one or more network entity.

3. method according to claim 2, also comprises:

More described state quality is measured, and wherein, described state quality is measured and is associated with all the other aggrieved party's network entities in described infringing party UE and described one or more aggrieved party's network entity; And

Wherein, described identification is at least in part based on described comparison.

4. method according to claim 3, wherein, it is one or more that described state quality measurement comprises in the following:

Reference Signal Received Power (RSRP);

Reference Signal Received Quality (RSRQ);

Path loss to described service eNB and described one or more adjacent eNB is measured;

CQI (CQI); Or

Their combination.

5. method according to claim 1, also comprises:

The second control signal is received, the strongly disturbing one or more reception Resource Block (RB) of described second control signal mark experience from described one or more aggrieved party's network entity; And

In response to described second control signal, adjust Initial Trans by described infringing party eNB.

6. method according to claim 1, wherein, described acquisition comprises: receive described state quality from described one or more network entity and measure, and wherein, described identification comprises: analyze described state quality and measure to determine described one or more aggrieved party's network entity.

7. method according to claim 1, wherein, described acquisition comprises: measure the described state quality be associated with described one or more network entity and measure, and wherein, described identification comprises: analyze described state quality and measure to determine described one or more aggrieved party's network entity.

8. method according to claim 1, also comprises:

Downlink time slots is divided at described infringing party eNB place according to frequency; And

In described downlink time slots, divide the first frequency being used in down link data, wherein, described first frequency is corresponding to the almost blank resource in the corresponding uplink time slot of described one or more aggrieved party's network entity.

9. method according to claim 1, also comprises:

At described infringing party eNB place, the up link Grant information of described one or more aggrieved party's network entity of decoding; And

At described infringing party eNB place, schedule downlink transmissions is to avoid and the uplink transmission collisions that indicates in decoded up link Grant information.

10. method according to claim 1, also comprises:

At described infringing party eNB place, by backhaul interface from described one or more aggrieved party's network entity receiving uplink transmission information; And

At described infringing party eNB place, schedule downlink transmissions is to avoid and the uplink transmission collisions that indicates in described uplink transmission information.

11. methods according to claim 10, wherein, described scheduling comprises:

The downlink subframe of conflicting with the uplink sub-frames of described one or more network entity is scheduling to almost blank subframe (ABS).

The method of 12. 1 kinds of radio communications, comprising:

At aggrieved party's evolved node B (eNB) place, from infringing party eNB reception control signal, wherein, described control signal instruction is for representing the transmission state of the interference at described aggrieved party eNB place; And

The transmission be associated with described aggrieved party eNB is dispatched, to alleviate described interference by described aggrieved party eNB.

13. methods according to claim 12, wherein, it is the eNB that the multiple UE comprising one or more aggrieved party's subscriber equipment (UE) serve that described aggrieved party eNB comprises.

14. methods according to claim 13, wherein, described control signal instruction expection from described infringing party eNB, to the strong jamming of one or more Resource Block (RB) distributing to described one or more aggrieved party UE.

15. methods according to claim 14, described scheduling comprises:

By the non-aggrieved party UE in the multiple UE of described aggrieved party eNB execution cost in subframe, wherein, described non-aggrieved party UE does not have to experience the interference caused by described transmission state in described subframe.

16. methods according to claim 12, wherein, described scheduling comprises:

By described aggrieved party eNB, divide the transmission time slot be associated with described aggrieved party eNB according to frequency; And

In described transmission time slot, divide the first frequency being used in down link data, wherein, described first frequency corresponds to the almost blank resource in the corresponding reverse transfer time slot be associated to described infringing party eNB.

17. methods according to claim 12, also comprise:

Detect the strong jamming in one or more up link RB; And

In response to described detection, send overload indicator to described infringing party eNB.

18. methods according to claim 12, wherein, described scheduling comprises:

Amendment hybrid automatic repeat-request (HARQ) time shaft, the uplink acknowledgment (ACK) dispatched with the uplink time slot avoided for the described aggrieved party eNB corresponding with the downlink time slots of described infringing party eNB/Negative Acknowledgement (NACK).

19. methods according to claim 12, wherein, described scheduling comprises;

Empty timeslots is dispatched in the uplink sub-frames of the described aggrieved party eNB corresponding with the downlink subframe in described infringing party eNB.

20. 1 kinds of devices being arranged to radio communication, comprising:

For being obtained the unit that state quality is measured by the infringing party evolved node B (eNB) be associated with one or more network entity;

For being measured based on described state quality by described eNB, identify the unit of one or more aggrieved party's network entities of the interference suffered from asymmetric up link (UL)/down link (DL) time slot; And

For the unit transmitted control signal to described one or more network entity, wherein, described control signal is relevant with the alleviation of described interference.

21. devices according to claim 20, wherein, described infringing party eNB comprises the eNB served for infringing party subscriber equipment (UE), and wherein, described infringing party UE is one in described one or more network entity.

22. devices according to claim 21, also comprise:

For the unit that more described state quality is measured, wherein, described state quality is measured and is associated with all the other aggrieved party's network entities in described infringing party UE and described one or more aggrieved party's network entity; And

Wherein, the described unit for identifying is at least in part based on the described unit for comparing.

23. devices according to claim 22, wherein, it is one or more that described state quality measurement comprises in the following:

Reference Signal Received Power (RSRP);

Reference Signal Received Quality (RSRQ);

CQI (CQI); Or

Their combination.

24. devices according to claim 20, also comprise:

For receiving the unit of the second control signal from described one or more aggrieved party's network entity, the strongly disturbing one or more reception Resource Block (RB) of described second control signal mark experience; And

For in response to described second control signal, adjusted the unit of Initial Trans by described infringing party eNB.

25. devices according to claim 20, wherein, the described unit for obtaining comprises: for receiving the unit that described state quality is measured from described one or more network entity, and wherein, the described unit for identifying comprises: measure for analyzing described state quality, to determine the unit of described one or more aggrieved party's network entity.

26. devices according to claim 20, wherein, the described unit for obtaining comprises: for measuring the unit that the described state quality that is associated with described one or more network entity is measured, and wherein, the described unit for identifying comprises: measure for analyzing described state quality, to determine the unit of described one or more aggrieved party's network entity.

27. devices according to claim 20, also comprise:

For dividing the unit of downlink time slots at described infringing party eNB place according to frequency; And

For dividing the unit being used in the first frequency of down link data in described downlink time slots, wherein, described first frequency is corresponding to the almost blank resource in the corresponding uplink time slot of described one or more aggrieved party's network entity.

28. devices according to claim 20, also comprise:

For at described infringing party eNB place, the unit of the up link Grant information of described one or more aggrieved party's network entity of decoding; And

For at described infringing party eNB place, schedule downlink transmissions is to avoid and the unit of uplink transmission collisions that indicates in decoded up link Grant information.

29. devices according to claim 20, also comprise:

For at described infringing party eNB place, by the unit of backhaul interface from described one or more aggrieved party's network entity receiving uplink transmission information; And

For at described infringing party eNB place, schedule downlink transmissions is to avoid and the unit of uplink transmission collisions that indicates in described uplink transmission information.

30. devices according to claim 29, wherein, the described unit for dispatching comprises:

For the downlink subframe of conflicting with the uplink sub-frames of described one or more network entity being scheduling to the unit of almost blank subframe (ABS).

31. 1 kinds of devices being arranged to radio communication, comprising:

For the unit at aggrieved party's evolved node B (eNB) place from infringing party eNB reception control signal, wherein, described control signal instruction is for representing the transmission state of the interference at described aggrieved party eNB place; And

For being dispatched the transmission be associated with described aggrieved party eNB by described aggrieved party eNB, to alleviate the unit of described interference.

32. devices according to claim 31, wherein, it is the eNB that the multiple UE comprising one or more aggrieved party's subscriber equipment (UE) serve that described aggrieved party eNB comprises.

33. devices according to claim 32, wherein, described control signal instruction expection from described infringing party eNB, to the strong jamming of one or more Resource Block (RB) distributing to described one or more aggrieved party UE.

34. devices according to claim 33, the described unit for dispatching comprises:

For the unit by the non-aggrieved party UE in the multiple UE of described aggrieved party eNB execution cost in subframe, wherein, described non-aggrieved party UE does not have to experience the interference caused by described transmission state in described subframe.

35. devices according to claim 31, wherein, the described unit for dispatching comprises:

For by described aggrieved party eNB, divide the unit of the transmission time slot be associated with described aggrieved party eNB according to frequency; And

For dividing the unit being used in the first frequency of down link data in described transmission time slot, wherein, described first frequency corresponds to the almost blank resource in the corresponding reverse transfer time slot be associated to described infringing party eNB.

36. devices according to claim 31, also comprise:

For detecting the strongly disturbing unit in one or more up link RB; And

For in response to the described unit for detecting, send the unit of overload indicator to described infringing party eNB.

37. devices according to claim 31, wherein, the described unit for dispatching comprises:

For revising hybrid automatic repeat-request (HARQ) time shaft, the unit of the uplink acknowledgment (ACK) dispatched with the uplink time slot avoided for the described aggrieved party eNB corresponding with the downlink time slots of described infringing party eNB/Negative Acknowledgement (NACK).

38. devices according to claim 31, wherein, the described unit for dispatching comprises;

For dispatching the unit of empty timeslots in the uplink sub-frames of the described aggrieved party eNB corresponding with the downlink subframe in described infringing party eNB.

39. 1 kinds, for the computer program of the radio communication in wireless network, comprising:

Have the non-transitory computer-readable medium of program code stored thereon, described program code comprises:

Obtain by the infringing party evolved node B (eNB) be associated with one or more network entity the program code that state quality measures for making computer;

For making described computer be measured based on described state quality by described eNB, identify the program code of one or more aggrieved party's network entities of the interference suffered from asymmetric up link (UL)/down link (DL) time slot; And

For the program code making described computer transmit control signal to described one or more network entity, wherein, described control signal is relevant with the alleviation of described interference.

40. according to computer program according to claim 39, and wherein, described infringing party eNB comprises the eNB served for infringing party subscriber equipment (UE), and wherein, described infringing party UE is one in described one or more network entity.

41., according to computer program according to claim 39, also comprise:

For making described computer according to frequency, divide the program code of downlink time slots at described infringing party eNB place; And

In described downlink time slots, the program code being used in the first frequency of down link data is divided for making described computer, wherein, described first frequency is corresponding to the almost blank resource in the corresponding uplink time slot of described one or more aggrieved party's network entity.

42., according to computer program according to claim 39, also comprise:

For making described computer at described infringing party eNB place, the program code of the up link Grant information of described one or more aggrieved party's network entity of decoding; And

For making described computer at described infringing party eNB place, schedule downlink transmissions is to avoid and the program code of uplink transmission collisions that indicates in decoded up link Grant information.

43. 1 kinds, for the computer program of the radio communication in wireless network, comprising:

For making the program code of computer at aggrieved party's evolved node B (eNB) place from infringing party eNB reception control signal, wherein, described control signal instruction is for representing the transmission state of the interference at described aggrieved party eNB place; And

The transmission be associated with described aggrieved party eNB is dispatched by described aggrieved party eNB, to alleviate the program code of described interference for making described computer.

44. computer programs according to claim 43, wherein, it is the eNB that the multiple subscriber equipmenies (UE) comprising one or more aggrieved party UE are served that described aggrieved party eNB comprises.

45. computer programs according to claim 43, wherein, the described program code for making described computer carry out dispatching comprises:

For the program code making described computer be divided the transmission time slot be associated with described aggrieved party eNB according to frequency by described aggrieved party eNB; And

For making described computer divide the program code being used in the first frequency of down link data in described transmission time slot, wherein, described first frequency corresponds to the almost blank resource in the corresponding reverse transfer time slot be associated to described infringing party eNB.

46. computer programs according to claim 43, also comprise:

For making the strongly disturbing program code in the one or more up link RB of described COMPUTER DETECTION; And

For making described computer in response to described for making described computer carry out the program code detected, send the program code of overload indicator to described infringing party eNB.

47. 1 kinds of devices being arranged to radio communication, described device comprises:

At least one processor; And

Memory, it is coupled at least one processor described,

Wherein, at least one processor described is configured to:

48. devices according to claim 47, wherein, described infringing party eNB comprises the eNB served for infringing party subscriber equipment (UE), and wherein, described infringing party UE is one in described one or more network entity.

49. devices according to claim 47, also comprise the following configuration of at least one processor described:

50. 1 kinds of devices being arranged to radio communication, described device comprises:

At least one processor; And

Memory, it is coupled at least one processor described,

Wherein, at least one processor described is configured to:

51. devices according to claim 50, wherein, it is the eNB that the multiple UE comprising one or more aggrieved party's subscriber equipment (UE) serve that described aggrieved party eNB comprises.

52. devices according to claim 50, wherein, at least one processor described comprises the following configuration of at least one processor described for the described configuration of dispatching: